Mammatus  – the rare but stunning clouds resembling bubble-wrap – filled the skies around Denver Wednesday evening behind a towering thunderstorm.  These pouch-like clouds, named after breasts, typically form in the sinking air in a storm’s wake, often signaling the worst weather has past.

The clouds were photographed mostly between 7 and 8 p.m. mountain time Wednesday evening, in some cases coinciding with the setting sun and the skies’ yellow and orange hues.

Related: Thunderstorms Make for Dazzling Skies over Denver (

It was quite the field day for spectacular mammatus cloud photos on Twitter, as evidenced below…


Panoramic views

Related: Stunning mammatus clouds south of Washington, D.C. | Mammatus clouds bubble up in Washington, D.C.’s evening sky (PHOTOS)